Toaru Majutsu no Index: Genesis Testament - Volume 1, Epilogue: Snow and Crimson Cover All — White_End.(and_Merry_Xmas!!)

The narrative follows a gamer who, after selecting the “Awakened Cinder” class in the game Fractured Dawn, finds himself transported into the game's world. However, this version of the game is devoid of its usual interfaces—no UI, no tutorials, and no second chances. Each death strips away a part of his memories and identity, immersing him deeper into a perilous reality.The protagonist, now known as Riven, must navigate the treacherous Witherlands, confronting formidable foes like the Gravemare and Dreamborn Horrors, while uncovering the mysteries of Emberlight, Grace, and Cindershrines. His journey is one of survival, self-discovery, and challenging the very fabric of this fractured world.

A young man was going about a normal day, and he went back home to his house being empty again, his parents had missed his birthday again.Just like all the other years before, there was nothing special about his 18th birthday it seemed.This however was far from the end, caught by something unexpected at his own house, he perished.It was supposed to be the end, however this only marked a new beginning.Faced with a great trial of will, and Karma, and passing with a score beyond anything else, he was given the Class Omni-Layer, and the Job Omni-Ruler along side a system to manage it all.All this to prepare him for a new world, a world of swords and magic, and classic isekai, but this world was anything except an easy trip.

This is a very interesting thing. It is obviously dim and black, but it can emit a golden light, which makes people deeply fascinated by it…

- Description from novelbuddy

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates